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' May 29. 1928. I Re. 16,982

H. COLOMB I PROCESS FOR FINISHING JEWEL SETTINGS AND PRODUCT THEREOF Original Filed April 24, 1923 XNVEN l/enrz' Ca/om ATTORNEY Reissued .May 29, 1928.

UNITED STATES- v Re. 16,982

PATENT OFFICE.

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The invention is also applicable to bushings t which are merely perforatedmetal used in time-keeping mechanisms whic are not provided with stones, but, on the contrary, are cylindrical metal pieces pierced or bored along their longitudinal axes.

- It is of great importance that the peripher of a jewel setting or bushing should be of exact circumference, having its center in the axis of the hole in the stone or in the axis of the hole in the bushing, as the case ma be.

The object of the present invention is to provide a method according to which the peripheral surfaces of bushings and jewel settings for time-keeping pieces can be rendered trulycylindrical and this with the reuired axial boring in the bushing or t rough the stone of the setting at the exact center of the circle defined by said peripheral surface. This is accomplished by maintaining the stone or the bushin in osition by the hole therethrough, so that t e axis of the latter is central with respect to an opening in a punch and a die, by means of which the circumference of the piece is then rectified-by forcing the work through the opening in the die.

This process ma be realized in difl'erent ways, that is by difierent forms of a paratus, some of which, by way of examp e, are embodied in the accompanying drawing. Such constructions, however, form no part of .the present invention; on the contrary, they form part of an application filed by me on September 28, 1921, under Serial No. 503,994, issued January 13, 1925, as Patent No.1,523,169. I

In the drawings:

Figs. 1, 2, 3 and 4 illustrate one method of carrying the inveaition 1into effect;

Fi 5 6 an 7 i lustrate-kxeflpect' "ivel three fiirther methods. y

Referring to Figs. 1-4 inclusive, a indicates a punch adapted to cooperate with a Min-eh 10, 1926, Serial No, 834,849, and April as, 1883.

reissue fled January 8, 1927. serial Ito. 159,488.

die 6. Through an opening in the latter is adapted to glide a guide-member c, which at one end is provided with a centrally-dis posed conical pin 11, for the purpose herein after to be described. The said guide-member makes a snug fit with the openin in the die b so that it can be reciprocated t rough said opening without the possibility of lateral movement. In Fig. 1, the parts are indicated in what may be termed their start- Y mg position, that is to say, the upper edge of the guide member c, is flush with the upper face of the die b, and the punch a is oised above the setting to be operated upon ut some little distance therefrom with a hushed jewel setting a: mounted on pin d. As the punch a commences its downward movement, the guide member 0 is retracted a little, as will be seen in Fig. 2, and, as the punch contacts with and forces the jewel setting downward, it will be seen that the said settin is bound to follow the guide member a into the opening. inthe die owing to its enga ement with the pin 01, which is located in tie axis of the said guide member and by reason of the fact that said member makes a good fit in the said opening. After the arts have attained the position shown in 1g. 2, the guide member a .is withdrawn to the position shown in Fig. 3, whereupon the punch a, in continuing its downward movement, forces the setting through the remainder of the opening in the upper part of the die, out into a channel e, through which is forced a current of air sufficiently strong to carry the setting out of the channel and into any appropriate receptacle or otherwise.

On the upward movement of the punch a, the guide member 0 also movesupwardly, until the said parts are a ain in position for a further setting to be placed on the pin (1, after which the operation is repeated as above described, and so on, all as above described with reference to Fig. 1 and therein illustrated.

Application for In the construction shownin Fig. 5,the pin d is disposed in a punch a placed underneath the die I). A spring f constantly maintains the pin in its operative position as shown in said figure. The pin, as in the What I claim and desire to secure by Leto5 first described example, is of a conical sha e ters Patentis:

and its purpose is to firmly maintain t e 1. The method of finishing theperipheral jewel setting an or the bushing, as the case surfaces of bearings for time-keeplng mecha- 5 may be, in a perfectly central position with nism, which consists in centering the hole 1n respect to the cutting ed e of the die I). The the bearing with respect to a die, forcing the 7 action will be obvious, In that described bearing into the die while maintaining it v, above. centered, and forcing the bearing through In the construction shown in Fig. 6, the the die, the walls of the die effecting the re- 10 punch a is on top. It is movable with required rectification of the bearing.

' spect to the die I) in which an opening is 2. In a method of finishingthe peripheral 7 made cooperating with the punch for the surfaces of bushings and settings for timerectification of the exterior periphery of'a keepin pieces, mounting and maintaining setting or bushing m. The conical guide the bus ings and settings by their axial borin d operates as before described, andthe ing in a centered position with respect to a nished bushed jewel is discharged through punch and a die, and then rectifying1 the 30 channel e. peripheral surface of said bushings an set- In the construction illustrated in Fig. 7, a tings b said punch and die by forcing them I 'guide member 0* holds the piece m to be throng the openin in the die, the walls of operated on in a centered position with rewhich opening per orm the required rectifis ect to the die b, which-is lowered to meet cation. 35 t e unch a. A ipe .1 passage 9 is pro- 3. In a method of finishing the peripheralvide in the lattert rough which compressed surfaces of bushings and settings for timeair asses to assist in holding the setting or keeping pieces, mounting and maintaining a5 bu ing in its place on the pm of the guide the bushings and settings in a centered posimember 0- during the entire; duration of the tion with respect to a punch and a die on a 90 finishing process. Afterwards the setting conical pin positioned in the axis of said or bushing can be ejected from the .inside of punch and die and on which in the bushin s the die through the channel e by means of and settings can be mounted y means of t e compressedair forced through the pipe or axial bore therethrough, and then forcing passage h. the work through the o ening in the die by 95 The metallic bushing or perforated and means of the punch, t e walls of the die bushed jewel forming the product of my, forming said opening eflfecting the required above described process both necessarily have rectification of the bushin s. and settings. outer peripheries exactly concentric with the 4. In a process for finis ing bushings and perforation which, in either case, is to serve settings for time-kee ing pieces mounting'loo as journal bearin for a rotating shaft or and maintaining the Imshings and sett' s pintle in the watch movement in which it is in centered position with respect to a punc to be used, and, in the case of abushed jewel, and a di by mean of an upstanding conical 40 this is true whether or not the inner periphin lo at d on a guide member adapted to ery of the bushing and the cooperating outer pass through an opening in the die, which 105 perlphery of the jewel set therein, is, or is pin is retracted as soon as the work is ennot', concentric with said perforation. ,Also, gaged by the die, and then forcing said work I any fine tool markin appearing on this through the di outer cylindrical meta lic periphery of said 5, Th m thod of finishing bushings and s g es y e P l to h settings for time-keeping mechanism com- 11 axls of said outer cylindrical surface, instead ising mo nting and amtainin the bushof enclrcling the same as would-be the case inks and settings by the axial ore there- 1f said outer bushing surface had been turned through on a conical pin disposed in the out m a lathe nstead of having been (he-cut, axial center of a punch and die, forcing the as above described. bushings and settings into an opening in the This feature is of considerable 1m ortance die of which said pin is the axial center, w $11611 bushmg 'j e 1 Set retracting said pin during the engagementm a watch movement b forc1ng 1t lnto a f th b hi s and tting b th di at 65. 11019 p q y' P11 1 i m vement the same time continuin the said movement plate or bridge, because any minute grooves through the die, and ally removing the or ridges formed by said tool mark ngs as bushings and settings from the die through a result of the cuttmg fictlolleof (118 then a lateral opening therein by compressed air. cooperate smoothly with any similar ones 6. A roduct of the herein described proc- 00 1n the hole in plate or brldgewhich may ess, being a centrally perforated journal have been produced by the similar cutting bearing for timepieces, having a cylindrical,

action of the punch which out said hole, or metallic die-cut outer iphery exactly conrectified it, as described in my ,1]. S. Patent centric with its centr perforation, all tool No. 1,571,756 granted February 22, 1926. marks on said outer periphery extending 'parallel to the axis of said perforation as a marks on said outer periphe extending 'result of the said die cutting of said periph parallel to the axis of said-per oration as a 10 er? result of the said die-cutting of said periph- A product of the herein described gzocery.

a ess, being a perforated, bushed jewel ar- Signed at Berne, Switzerland, this 19th ing for watches having a cylindrical, metal day of August, 1927. lic, die-cut perighery' exaetl concentric with the axis of sai jewel per oration; all tool HENRI COLOMB. 

